Lock



lMarch 15,1927.

C. F. MEILINK l LOCK Filed Aug. 19, 1922 "Ihm, W 'lmllml if" 11.,.1,

35 .a4 3/ 30 segg; 44 k Cm; rif-MK `Patentedy Mar. y15, 1927.

UNH ED n. NsrATpEs- Application` mea August 19,1922..yse'riaiiiof582,867.

This invention relates to bolt holding devices in locks'. i Thisinvention hasl utility when incorporated in connection with tumblerlocks 5 wherein the tumbler ope-rated yspindle may shift a bolt, therebeing supplemental provision precluding Vbolt shifting when'thrown byany attempt to force the spindle.

Referring to the drawings- Fig. 1 is a fragmentary view of ardouble doorsafe or vault having an embodiment of the lock as herein disclosed;

Fig. 2 is a view on being broken away,

of the spindle and the 15 lock mechanism associated therewith;

Fig. 3 is a view similar to Fig. 2 as to the lock mechanism whereinvattempt has been madeto force the spindle which has i resulted in thebolt being held thrown; and Fig. 4 is a back or rear view of the' lockwith the back plate removed.`

The fire or burglar proof safe is provided with doors l, 2, havingmultiple bolt throwing handles 3, 4. The operation of the handle 4 forthrowing the bolts which hold the doors against shifting as to the safedoor frame is precluded by positioning a bolt fromv a tumbler lockmechanism.` v l As herein disclosed the door 2 is provided with a plate5 carrying an index mark`6. This plate 5 is aboutl'opening 7. Throughthis opening 7 extends sleeve 8 anchored therein by lock nuts 9, 10,upon threaded porti-on 11 of this sleeve 8. Knob 12 is provided withbearing 13 for centering spindle 14 in the sleeve 8. `Fixed with thespindle knob 12 and the spindle 14 is a graduation carrying plate 15rotatable as to the index or pointer 6 in rotating tumbler 16, andthereby shifting successive tumblers l17 ,j 18, and 19, brings theirrespective notched portions 20, 21. 22, 23, into registry with dog 24and by clockwise movement of the spindle 12 positively shifts ,the dog24. `This dog 24 is mountedvon fixed pin 25 and by spring 26 is normallyurged into notch engaging position. Fixed with this dog 24 is lug 27coacting with recess 28 in reciprocable bolt 29, whereby the clockwisemovement of Y .so the spindle knob 12 may normally effect withdrawal ofthe bolt 29 as the tumblers have their several notches brought intoregistry to receive the dog 24. This bolt 29 is held for reciprocablemovement by opening 30 in lock housing 31 and by opening through thebolt to ride over the spindle 14.` The lock housing-,31 is provided witha cover plate 33 which is anchored into position by screws 34 e-ngagingposts 35 carried by the housing 31. i i

Upon a side wall of the housing 31 is fixed bearing pin 36 asa fulcrumfor-lever 37. About this fulcrum 36 is a torsion spring l38 having oneend 39 engaging the bottom of the lock housing 31. The other end 40 o fthis torsion spring 38 engages offset portion 41v of this lever 37, andaccordingly j normally tendsto throw the remote free end an enlargedscale, parts y or oset portion42 of this lever 37 into. engagement ,withshoulder 43 of the bolt 29. This engagement of the, bolt 29 by thisholder or lever 37 is inthe thrown position of the bol't 29.l Thisholder lever 37 is normally held in the .position shown in Fig. 2away-from interfering with the normal throw and withdrawal of the bolt29, for the cover plate-33 has thereon projection `ArEiNrOFFICE.:

44 which4 may y'engage the odset 41 and so l hold the lever 37 againstythe action ofthe i spring 38 that the offset end 42 is clear of thebolt 29.

The safety device vvalue of this bolt holder 37 y arises from the .factthat in attacks upon .burglar proof structures, the projecting knob 12of the spindle is sometimes broken off or effort made toibreak such andvwhen broken it is not unusual to attempt to force the spindle 14 inwardfor the purpose of `releasing the tumblerssov that the bolt 29 will befree and permit the rocking of the handle.

However, n this constructiomat once the spindle 14 is thrust inwardtopush the fcover plate 33, such cover plate as released takes` with itthe projection 44 and `allows the spring 38 to vpositively lock the bolt29`r against withdrawal 'as thef'ofisetend 42 comes 'against shoulder 43of the bolt 29. 'l There is accordinglyv provided in this construct-ienasimple safety device or guard in the way of `a protection 'to tumblerlocks as used in'safe or vaultw-ork. Y

What is claimed and it is desired to secure by Unitedv States LettersPatent A'door having a wall, a spindle through said wall, a lockhousingsection into which the spindle extends, tumblers in said sectionabout said spindle, a sleevefor the, spindle abutting the housingsection` about the spindle and axially of which sleeve the spindle Aisshiftable into said section with said tumblers, a closure section forthe `houslng section axially beyond the spindle, a projec-y ico tionfixed .with said,closut'esection, a bolt against said ploj-ectonand'coacting as said mounfed in the' housing sectonfor shifting projectionis displaced by axial shifting of radially of the spindle to protrudefrom said the spindle as to the sleeve to swing the 10 housing section,said bolt;havng-fag'ledgein; o afchinto .engagement with said bolt ledge5 the housing section, a catch pi'votallymountto preclude Withdrawal ofthe bolt.

ed in the housing section, and a toi'sionl.` 11n Witness whereof I affixmy signature. spring swinging said cachjntoheld position n CHARLES F.MEILINK.

